Electrical computers and digital processing systems: support – Multiple computer communication using cryptography – Protection at a particular protocol layer
Patent
1996-01-02
2000-05-23
Le, Dieu-Minh
Electrical computers and digital processing systems: support
Multiple computer communication using cryptography
Protection at a particular protocol layer
713202, 395712, 380 3, 380 45, H04L 900, G06F 1214
Patent
active
060676221
ABSTRACT:
Disclosed is a software-based system and method for restricting unlicensed software duplication and installation. The invention features a software security system using a remove function for restricting unauthorized duplication and installation of an application program onto one or more data processing systems. The software security system includes an installation program and an application program. The application program as written is "un-runnable" owing to nonsense instruction sets dispersed throughout the actual programming instructions of the application program. An installation program routine comprises software instruction sets for removing the nonsense instruction sets in the application program. The software security system executes an instruction set to delete the nonsense instruction sets upon installation of the application program into one or more data processing systems thereby allowing application program to be executed once loaded onto the system(s), upon correspondence between an internal run key and an execution-time run key.
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